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G4ParticleHPArbitaryTab.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4ParticleHPArbitaryTab.cc
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// neutron_hp -- source file
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// J.P. Wellisch, Nov-1996
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// A prototype of the low energy neutron transport model.
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//
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// P. Arce, June-2014 Conversion neutron_hp to particle_hp
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//
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#include "
G4ParticleHPArbitaryTab.hh
"
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#include "
G4ios.hh
"
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G4double
G4ParticleHPArbitaryTab::Sample
(
G4double
anEnergy)
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{
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G4int
i;
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for
(i=0;i<
nDistFunc
;i++)
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{
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if
(anEnergy<
theDistFunc
[i].GetLabel())
break
;
// that is the energy we need
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}
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G4int
low(0), high(0);
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if
(i==nDistFunc)
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{
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low = i-2;
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high = i-1;
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}
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else
if
(i==0)
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{
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if
(nDistFunc==0)
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{
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G4cerr
<<
"No distribution functions to sample "
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<<
"from in G4ParticleHPArbitaryTab::Sample"
<<
G4endl
;
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throw
G4HadronicException
(__FILE__, __LINE__,
"nDistFunc==0"
);
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}
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else
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{
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return
theDistFunc
[0].
Sample
();
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}
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}
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else
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{
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low = i-1;
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high = i;
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}
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//************************************************************************
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//EMendoza
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/*
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theBuffer.Merge(theManager.GetScheme(low), anEnergy,
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theDistFunc+low, theDistFunc+high);
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return theBuffer.Sample();
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*/
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//************************************************************************
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//New way to perform the 2D sampling:
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G4double
elow=
theDistFunc
[low].
GetLabel
();
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G4double
ehigh=
theDistFunc
[high].
GetLabel
();
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G4double
rval=(anEnergy-elow)/(ehigh-elow);
//rval is 0 for elow and 1 for ehigh
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G4double
eoutlow=
theLowThreshold
[low]+rval*(
theLowThreshold
[high]-
theLowThreshold
[low]);
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G4double
eouthigh=
theHighThreshold
[low]+rval*(
theHighThreshold
[high]-
theHighThreshold
[low]);
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G4double
rand=
G4UniformRand
();
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G4double
Eout_1=0,Eout_2=0;
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if
(rval<rand){
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Eout_1=
theDistFunc
[low].
Sample
();
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Eout_2=eoutlow+(Eout_1-
theLowThreshold
[low])*(eouthigh-eoutlow)/(
theHighThreshold
[low]-
theLowThreshold
[low]);
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}
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else
{
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Eout_1=
theDistFunc
[high].
Sample
();
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Eout_2=eoutlow+(Eout_1-
theLowThreshold
[high])*(eouthigh-eoutlow)/(
theHighThreshold
[high]-
theLowThreshold
[high]);
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}
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return
Eout_2;
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//************************************************************************
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}
geant4
tree
geant4-10.6-release
source
processes
hadronic
models
particle_hp
src
G4ParticleHPArbitaryTab.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:48
using
1.8.2 with
ECCE GitHub integration